Quote Originally Posted by travajante View Post
Some OCD tips....
-Always request for drainpipes larger than their "standard" 3/4". When drain & dirt mix, the jelly formed can easily clog the line.
-Install your wall units on perimeter walls, if you can...where the tubes go straight out the structure. Keep future interior leak risks at the minimum.
-Ceiling cassette units have drain pumps. When the pump goes....instant leak. Avoid these. The blown air hits the ceiling & leaves dirt you'll have to clean or paint over.
-Never allow insulated tubes running thru ceilings bare. Do not believe when they say the lines are properly wrapped. When humid air hits a cold line, condensation is instant. They must be guttered.
-Whenever possible, do not embed lines in concrete or dry walls. They are best hidden behind removable cladding or covers guised as vertical spouts. You'll be glad you did come repair or replacement time.
Collateral damage on walls & ceilings from mere condensation will be unsightly & costly. In areas where you've electrical lines running, moisture contamination can be disastrous. Plus, repaired walls where old plaster meets new will never be as good as virgin 1s.
-Find the shortest distance to the condensing unit. This will optimize cooling efficiency.
-Tubes must have no joints except on the ends of indoor & outdoor units. This will lessen leak risk & make future troubleshooting a lot easier. Pressure test them prior to installation & activation of AC.

And....if you have an issue w/ privacy & strangers coming into your rooms for the entire duration of AC cleaning or servicing; if you can sleep & live w/ AC noise; & if you are not conscious of looks....be practical....GO WINDOW. They're cheaper. Washes are done outside. Swaps are instant & DIYable.
The experienced architects & engineers I know who design & build like the structures were their own..... share all the above.[emoji4]

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i agree.
installing them, permanently hidden from view does make for good-lookin' house.
but come repair time, it promises big headache and considerable expense.
my colleague opted for good looks. now he is facing major work, to fix the leak.